Apparatus for adding one liquid to another



Machzs, 1948. SMALLEY 2,438,327

APPARATUS FOR ADDING ONE LIQUID TO ANOTHER Filed Feb. 16, 1944 2 Sheets-Sheet l March 23, 1948. y W, SMALLEY 2,438,327

APPARATUS FO lADDING ONE LIQUID TO ANOTHER Filed Feb. 1e, 1944 2 sheets-sheet 2 Patented Mar. 23, 1948 APPARATUS FOR ADDING ONE LIQUIDl To ANOTHER William Smalley, London, England, lassignor to The Paterson Engineering Company Limited,

London, England Application February 16, 1944, Serial No. 522,613 In Great Britain February 24, 1943 Cl. B10-18) 7 Claims. 1

This invention relates to apparatus for effecting the proportional addition of one liquid to another and has for its object to provide an improved apparatus for this purpose that is simple and effective and which is particularly suitable in cases where the liquid to be proportioned contains suspended solids as, for example, milk of lime for water softening or eflluent neutralization although it will be understood that the invention is capable of more general application.

The invention resides in apparatus for the purposes referred to comprising a dosage regulating device to which an excess of addition liquid over the maximum required is fed and means for dividing this feed into tWo parts, one of which is the correct dose and which passes to the liquid t which it is to be added, while the other is excess and is returned to the source of supply or otherwise dealt with.

In the past many forms of Iapparatus have been proposed in which an excess of addition liquid or reagent was supplied to a first stage and this divided into two parts, one of which was delivered to the receiving liquid and the other returned to' the supply source. All such apparatus, however, fell short of fully meeting the situation that commonly exists in that they did not include means for adjusting the dosage with respect to two variables in the receiving liquid.

Thus, for instance, in the treatment of Water the volume of the owing stream of water entering to be treated will vary in accordance with the requirements of water for use. While at the same time the character of the water may itself vary requiring a different dosage for the same quantity of water. In some cases as, for instance, where the water supply is taken from a stream the changes in amount of reagent for a given quantity of water may be frequent and rapid. In the past it has been the practice to meet such changes in the character of the liquid by varying the strengthA of the dosage reagent but this is not readily done particularly so as the need for a change may occur when the container containing supply is, ,for instance, half full and a double computation is required as to the making of a change. A principal object of my invention is to overcome this diiculty and provide for changing the dosage quickly whenever required. This permits the reagent solution to be always made up of the same strength which is a great convenience.

Further features of th-e invention will be apparent from the description given hereafter.

Figure 1 is a perspective view of the preferred form of apparatus in accordance with the invention. Figure 2 is a sectional detail on a slightly enlarged scale through the submerged adjustable orifice controlled by a regulating valve. Figure -3 is a perspective viewv of a modified form of the apparatus in which the trough is shiftable, and Figure 4 is a perspective view along the lines of the preferred form but embodying the modification of a venturi connected to two float columns.

In carrying my invention into effect in one convenient manner as shown in Figures 1 and 2- I provide a suitable container a in which the cream of lime or like addition liquid is maintained in a constant state of agitationby paddles b driven, for example, rby a motorised reduction gear c which may be located upon the container. 'Ihe paddles are conveniently provided with lifting cups d which discharge the liquid into a trough e arranged within the container and above the general level of the liquid therein, and from this trough the liquid flows through a regulating gate f into a pocket g on the outside of the container discharging into va trough h mounted for horizontal movement about a vertical axis and which trough is referred to hereafter as the distributing trough. v

The swinging movement of the trough is made dependent upon the flow of the main body of liquid to which the addition liquid is to be fed and such distributing trough delivers the liquid into a dividing box z' furnished with a partition z" dividing the box into two separate chambers, one of which has an outlet k leading to the main liquid ow while the other has an outlet lc returning excess addition liquid to the supply container.

In the particular construction illustrated'the main liquid flow passes through a weir chamber Z in which is a float m riding on the surface of the liquid above the weir l', and the float in its movements dependent upon the'volume of liquid flowing actuates a cam n which bears against an arm h secured to th-ev distributingtrough h, contact between the cam and arm being maintained by a suitable torsion spring g. v

The arrangement isV such that the addition liquid delivered from-the distributing trough is divided so that the correct*l .proportion depending upon the volume of flow of the main liquid isdelivered at all ltimes to the said liquid while the excess not required forthe correct dosage is returned to the supply container. Therate of dosage may at any time be very conveniently increased or decreased by regulation of the calibrated adjustable gate f through which the liquid emerges from the trough within the container,

3 There is shown in- Figure 3 a modied arrangement of the invention in which the box rather than the trough is shiftable and in this arrangement the box i2 with division plate i3 is moved .backwards and forwards by movement of the 'through the differential gear 1 actuate the arm h2 to move the trough h3 in unison with variations of flow through the venturi.

It is apparent that the differential head created by the venturi is used to .position the distributing trough. Otherwise the parts are the same as shown 'in Figure 1. i

It will "be understood that the foregoing details of 'construction are given purely by Way of example to indicate the nature of the invention and netto limit its scope.

Having thus fully Ydescribed the invention what is claimed as new 'and desired to be `secured. by Letters Patent is: Y A Y y 1li ApparatusV for effecting the proportion addition of one liquid Vto another comprising a dosageregulating device to which an excess of additin liquid over themaximum required is fedg'said device comprising a first feed controll meansV in the formof a gate,1 means ahead ofthe gate adapted to maintain a constant liquid head on the gate' and including a source of supply and means following the gate kfor dividing the liquid which passes through the'gate into two parts including a trough'memberV and a dividing box mem-ber'having chambers vfor receiving said two parts, Vone of the chambers receiving the correct dose and the other receiving the excess liquid,Y means .ior'pa'ssing the correct dose fromV the chamber to the liquid to which it isto be added, means for passing from the other chamber `the excess-liquid andreturning itto thesource of supply, said trough member and said box Amem- ,berfV being laterally shiftable one relative to the other'iri a direction to'changetherelative position ofthe trough member on the one hand and Ythe-,box member onr Ytlije Vother'hand,"means for Shirtingftheshiftabie of said members ineiiiding aniovable memb'erf'andmmeansfor moving 4said movable 'member bythe liquid to be dosed in response to the variations in the rate of iiow of said liquid and means fo-'r transmitting motion from the'lastnientioned movable member to the shiftable 'of the iirst two mentioned members.

2. lnp3-:alanis for effecting the proportienai additional' of one liquidv t0 another comprising theieedrinto two parts one of which is the correctY dose which passes to the liquid to be dosed while the yother .is excess which is returned' to the source of supply, said dividing means including a distributing troughlmember and a dividing box member, said trough'imember and said box mem- 'ber' being laterally shiftable one relative to thev other Vin a direction to changetherelativ'e posi-'- tions of the trough member `on the one yhand and The other parts of the ap 4 the box member on the other hand, and means for shifting the shiftable of said members, said shifting means comprising a movable member and means for movingsaid movable member by the liquid to be dosed in response to variations in the rate ofrow of sa'i'd'liquid and anl articulated connection joining saidV movable member and the shiftable of the two rst mentioned members.

Y 3. Apparatus for eiiecting the proportional addition of one liquid to another in a main liquid iiow and wherein an excess of addition liquid is fed comprising in' series an 'adjustable gate, said Agate'controlling'a normally submerged orice a by said main liquid flow and an operable conneclv tion joining said latter movable member and the shiftable of the iirst mentioned members.

' 4. Apparatus according to claimk 3 .in which Athe movable member of the shifting means is'in the form of a iioatV riding upon the Vmainliquid flow. and comprising a cam Voperabiy connected tothe iioat and in operable connection with fthe'trough Y member. l

5. ApparatusV as claimed in claim S'wherei'n the said shifting means comprises adiierentialjprese s moved by the main liqui'diiow is in the formof sure creating device inthe path ofthe jmain liquid flow, the movable meinbeipositioned to be 6. In combination in apparatus off the typefde# scribed, a supply containerlfoiwafiirst"liquiizlgeJ flow channel for a second liquid and controimeans for eiecting delivery of a predetermined proportion of the first liquid. to the second liquid-said ineans'being characterized in that: it comprises a rst and a second control whereby the 'proper` tion of rst liquid delivered to the second may. be

varied responsive to variations in quantity'cfthe second liquid, said control means',comprisingA a receptacle in said container, means fo'nd'elivering an excess of liquid into said receptacle from .said

container,` an overiiow return' from'sai'd'r-e'cep-i tacle to said container, a delivery outletviromsaidi receptacle, a manuaily'adjustabl'e member con` trollingiiow through said outlet', ai trough (mem-f,

ber receiving liquid froinsaid outlet-said trough member having abroad and 'relatively shallow relative to the'other in a direction to changethe relative positions 'of the dischargejend of '.the trough member on the one hand and the partitions and chambers on the other hand tovary' the quantity ofthe first liquid delivered `to eachf of said chambers, and means; forishiftingthe shiftable of saidm'embers upon'ch'anges'oi flow Y said channel, said last meanstcomprising'a float` on the liquid in saidchannel and means compris ing at least one movable member joined to said iioat and to the shiftable of the members whereby motion will be transmitted from the former to the latter.

7. Apparatus for eiecting the proportional addition of one liquid to another comprising a supply container for the liquid to be added, a flow channel for the receiving liquid, a chamber in said container, means to deliver an excess of liquid from said container to said chamber, said chamber having a return overflow establishing a predetermined level therein and an outlet, an adjustable control whereby ilow through said outlet may be varied, a trough member receiving liquid from said outlet, said trough member having an outlet adapted to discharge liquid therefrom in the form of a stream that is broad relative to its depth, a receiving member placed to receive the stream discharged from said trough member, a partition dividing said receiving member into two chambers, an outlet from one of said chambers leading back to the supply container, an outlet from the other chamber leading to the receiving liquid in the flow channel, the said trough member and said receiving member being laterally shiftable one relative to the other, and means to laterally shift one of said members, said means comprising a meter positioned in the channel to meter the receiving liquid, said meter having a part moving with changes in the quantity of receiving liquid and a linkage operatively joining the moving part and said laterally shiftable of said members, whereby the quantity of supply liquid discharging into said other chamber will vary with variations in the quantity of receiving liquid.

WILLIAM SMALLEY.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date Re. 18,510 Green July 5, 1932 897,940 Van Gundy Sept. 8, 1908 926,843 Bartlett July 6, 1909 1,007,176 Bartlett Oct. 31, 1911 1,179,311 I-Iinman et al Apr. 11, 1916 1,262,730 Yoder Apr. 16, 1918 1,276,315 Best Aug. 20, 1918 1,321,622 Green Nov. 11, 1919 1,523,118 Green Jan. 13, 1925 1,638,119 Green Aug. 9, 1927 1,749,130 Craig Mar. 4, 1930 1,766,625 Geary June 24, 1930 1,943,362 Bailey Jan. 16, 1934 2,211,753 Leopold Aug. 20, 1940 FOREIGN PATENTS Number Country Date 3,397 Great Britain 1910 194,672 Great Britain May 8, 1924 

